From f28c0f37f2cca421ea3d32935035078ad3706788 Mon Sep 17 00:00:00 2001
From: drh <>
Date: Thu, 4 Sep 2025 09:26:53 +0000
Subject: [PATCH] Use Pgno instead of int for the pgno field in the
 DbpageCursor object. The same machine code is generated, but using an
 unsigned value seems safer in the long run.
 [forum:/forumpost/ccec20a858|Forum post ccec20a858].

FossilOrigin-Name: 26ecdde06cce063143144a79c0b4979ed5ec27548da6f127176a420c1c3f17ce
---
 manifest      | 14 +++++++-------
 manifest.uuid |  2 +-
 src/dbpage.c  | 12 ++++++------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/manifest b/manifest
index 61725181da..4b57b0a61c 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sa\stypo\sin\sa\scomment\sin\scarray.h.
-D 2025-09-03T21:19:11.784
+C Use\sPgno\sinstead\sof\sint\sfor\sthe\spgno\sfield\sin\sthe\sDbpageCursor\sobject.\nThe\ssame\smachine\scode\sis\sgenerated,\sbut\susing\san\sunsigned\svalue\sseems\nsafer\sin\sthe\slong\srun.\n[forum:/forumpost/ccec20a858|Forum\spost\sccec20a858].
+D 2025-09-04T09:26:53.665
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -689,7 +689,7 @@ F src/build.c 213a9d24c931ef4694564894cda8dac8dbeb1519d428fd2d7ae622ac357c05a5
 F src/callback.c acae8c8dddda41ee85cfdf19b926eefe830f371069f8aadca3aa39adf5b1c859
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
 F src/date.c 9db4d604e699a73e10b8e85a44db074a1f04c0591a77e2abfd77703f50dce1e9
-F src/dbpage.c b3e218f8ed74fcbb7fa805df8ca669a3718d397617b3d8a8aac3307dc315c4d6
+F src/dbpage.c a6f7f16fde5656686b05705d41a4cb339db8262dc4d11699b7b40ba503db624e
 F src/dbstat.c 73362c0df0f40ad5523a6f5501224959d0976757b511299bf892313e79d14f5c
 F src/delete.c 03a77ba20e54f0f42ebd8eddf15411ed6bdb06a2c472ac4b6b336521bf7cea42
 F src/expr.c 0cad74107489c688449d7fec47b605c61a75c6da707031dfc4c76d1ac75667b3
@@ -2172,8 +2172,8 @@ F tool/version-info.c 3b36468a90faf1bbd59c65fd0eb66522d9f941eedd364fabccd7227350
 F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
 F tool/warnings.sh 1ad0169b022b280bcaaf94a7fa231591be96b514230ab5c98fbf15cd7df842dd
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 70923a00cfca2c64b7c7c824325ab75cdd05d452b79d2eaf43297898af891c47
-R fcce32c4245aa91fb3a6f09448c3b1c5
-U dan
-Z 01f3d671913ddaeee1abf21e08db30f2
+P a4e137de0e82fbba890c2a608578f02f3666d2c25fb76f95ddf2d6a096a30e6c
+R 74a121566763b43ba4139274c7ec5d78
+U drh
+Z d147c8b5254b99458119dadcc21fa7d0
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index f27ab23704..664d18ba1a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-a4e137de0e82fbba890c2a608578f02f3666d2c25fb76f95ddf2d6a096a30e6c
+26ecdde06cce063143144a79c0b4979ed5ec27548da6f127176a420c1c3f17ce
diff --git a/src/dbpage.c b/src/dbpage.c
index 4e2addad90..2508c3cb0a 100644
--- a/src/dbpage.c
+++ b/src/dbpage.c
@@ -46,7 +46,7 @@ typedef struct DbpageCursor DbpageCursor;
 
 struct DbpageCursor {
   sqlite3_vtab_cursor base;       /* Base class.  Must be first */
-  int pgno;                       /* Current page number */
+  Pgno pgno;                      /* Current page number */
   int mxPgno;                     /* Last page to visit on this scan */
   Pager *pPager;                  /* Pager being read/written */
   DbPage *pPage1;                 /* Page 1 of the database */
@@ -184,7 +184,7 @@ static int dbpageOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor){
   }else{
     memset(pCsr, 0, sizeof(DbpageCursor));
     pCsr->base.pVtab = pVTab;
-    pCsr->pgno = -1;
+    pCsr->pgno = 0;
   }
 
   *ppCursor = (sqlite3_vtab_cursor *)pCsr;
@@ -284,12 +284,12 @@ static int dbpageColumn(
   int rc = SQLITE_OK;
   switch( i ){
     case 0: {           /* pgno */
-      sqlite3_result_int(ctx, pCsr->pgno);
+      sqlite3_result_int64(ctx, (sqlite3_int64)pCsr->pgno);
       break;
     }
     case 1: {           /* data */
       DbPage *pDbPage = 0;
-      if( pCsr->pgno==((PENDING_BYTE/pCsr->szPage)+1) ){
+      if( pCsr->pgno==(Pgno)((PENDING_BYTE/pCsr->szPage)+1) ){
         /* The pending byte page. Assume it is zeroed out. Attempting to
         ** request this page from the page is an SQLITE_CORRUPT error. */
         sqlite3_result_zeroblob(ctx, pCsr->szPage);
@@ -363,10 +363,10 @@ static int dbpageUpdate(
     goto update_fail;
   }
   if( sqlite3_value_type(argv[0])==SQLITE_NULL ){
-    pgno = (Pgno)sqlite3_value_int(argv[2]);
+    pgno = (Pgno)sqlite3_value_int64(argv[2]);
     isInsert = 1;
   }else{
-    pgno = sqlite3_value_int(argv[0]);
+    pgno = (Pgno)sqlite3_value_int64(argv[0]);
     if( (Pgno)sqlite3_value_int(argv[1])!=pgno ){
       zErr = "cannot insert";
       goto update_fail;
-- 
2.47.3